Tube cutoff machine



Nov. 11, 1941.' T. c. GE ST EFAL TUBE CUTOFF MA HINE Filed Aug. 26, 1940 3 Sheets-Sheet Nov. 11, 1941. T. c. GEST ETAL TUBE CUTOFF MACHINE Filed Aug.- 26, 1940 3 Sheets-Sheet 2 tube and the ring being Patented Nov. 11, 1941 TUBE CUTOFF MACHINE Therlow C. Gcst, Cleveland, and Ralph E.

Spiker, North anton. Ohio Application August 26,1940, Serial No. 354,214 9 Claims. '(01. 82-20) The invention relates to machines for cutting of! tubes, bars, and the like, and more particularly to a machine for cutting of! tubes and facing the ends of the cut to produce a tube of accurate length.

The object of the invention is to provide a machine for cutting oil tubes and the like and facing the ends of the cut, the cutting off and facing tools being rotated and moved radially relative to the tube, relative longitudinal movement being produced between the tube and the facing tools.

Another object is to provide a machine of this character in which the tube to be cut oil is gripped on opposite sides of thecut by clamping collets, the cutting off and facing tools being carried in a ring which is rotated relative to the tube, the tools being fed radially relative to the moved longitudinally in opposite directions relative to the tube.

Another object is to provide a machine of this character in which the insertion of the tube into the machine automatically starts a cycle of movement which causes the clamping collets to grip the tube on each side of the cut, feeds the tools radially toward the tube, moves the facing tools longitudinally in opposite directions relative to the tube then withdraws the tools radially and releases the clamping collets.

A further object is toprovide a machine of this character in which a cycle of movement is started by contact of the end of the tube with a micro.- switch and the cycle of movement is stopped by contact of a cam with another micro-switch.

A still further object is theprovisio'n of a machine of this type in which cutting off and facing tools are carried in a continuously rotating ring, in which the clamping collets are operated by a fluid cylinder controlled by the starting microswitch, in which the tools are moved radially inward by cam means operated by the starting miere-switch, in which the tool carrying ring is moved longitudinally of the tube in opposite directions by cam means operated by the starting micro-switch, and in which the fluid cylinder is operated to release the clamping collets by means of a second micro-switch.

The above objects together with others which will be apparent from the drawings and following description may be attained by constructing the improved machine in the manner illustrated in the accompanying drawings in which Figure 1 is a side elevation of the improved tube cut-oil machine showing the parts in the starting position, parts being broken away for the purpose of illustration;

Fig. 2, a transverse sectional view taken as on the line 2-2, Figure 1;

Fig. 3, a transverse sectional view taken as on the line 3-3, Figure 1; 4

Fig. 4, a perspective view of the cut-oil tool;

Figs.- 5 and 6, perspective views of the two facing tools; and

Fig. 7, an enlarged plan sectional view of the machine, and Fig. 8, a detail sectional view taken on the line 33, Fig. 2.

Similar numerals refer to similar parts throughout the several views.

The machine may be mounted upon a bed l0 supported above the floor by any suitable means such as legs or uprights ll,

Spaced housings i2 and I3 are supported upon the bed l0 and an upright motor supporting bracket I4 is mounted upon the bed near one end thereof and supports the motor IS.

A second motor I8 is mounted upon the bed preferably, beyond the bracket i4 and the shaft l1 thereof may be operatively connected through a gear reduction indicated'generally at l8 with the cam shaft l9 which is journaled in suitable bearings 20 mounted upon the bed iii.

A hearing indicated generally at 2i is provided with wings 22 having the longitudinal ribs 23 slidably mounted within the ways 24 formed at the upper ends of the housings l2 and i3 whereby the bearing 2i may be slidably moved in said ways longitudinally of the machine as will be later described.

The rotating tool holder is indicated generally at 25 and has the peripheral ribs 26 rotatably mounted within the annular groove 21 formed in the interior of the bearing 2|.

This tool holder has a pulley 23 formed integrally therewith at one side of the bearing 2i and provided with a V groove 29 to receive the V belt 30 which is located around the pulley 3| upon the shaft 32 of the upper motor I5.

Bearings 33 and 34 are mounted upon the housing I2 and i3, respectively, for supporting clamping collets aswill now be described.

A tubular housing 35 is mounted within the bearing 33 and provided with a reduced portion 33 whichextends longitudinally toward the tool holder 25.

The split collet 31 is provided with a screw threaded inner end 33 threaded within the tubu- 86 of the tubular housing and extends beyond the same having the internally tapered end 4I engaging the tapered end 39 of the collet.

A peripheral groove 42 is formed in the enlarged outer end portion 48 of the clamping collar to receive the studs 44, carried by the yoke 45 which yoke is pivoted at 46 upon the housing I2 and provided with the depending lever arm 41 pivotally connected as at 48 to the piston rod 49 of a fluid cylinder 60.

The bearing 34 has a tubular projection 6| of reduced external diameter extending toward the tool holder 25. v

The split clamping collet 52 is mounted within the said hearing by means of the threaded outer end 53 engaged in the internal threads 54 of the bearing and tapered end 55 of the collet projects beyond the end of the reduced projection 6i.

The clamping collar 56 is mounted for longitudinal sliding movement upon the tubular projection and is provided with the internally tapered projection 51 engaging the tapered end 55 of the collet.

The collar 56 is provided with a peripheral groove 58 which receives the studs 59 upon the yoke 60. This yoke is pivoted at 6| upon the housing I3 and has the depending lever arm 62 formed thereon and pivotally connected as at 63 with a pair of ears 64 upon the outer end of the fluid cylinder 50.

The cut-off tool 65 and the left and right facing tools 06 and 61, respectively, are mounted in slidable tool carriers 68 mounted for sliding movement within the radial guide grooves 69 in the tool holder 25.

These tool carriers are adapted to be universally operated by means of a. collar I0 slidably mounted upon the exterior of the tubular housing 40 and mounted to rotat in unison with the tool holder 25 as by means of posts II fixed to the tool holder 25 as by the, pins 12 and slidably located within the longitudinal bores 13 in said collar.

An inclined post I4 is fixed to each tool carrier 68 as by a pin and slidably received within the corresponding inclined bore I6 in the collar 10.

A peripheral flange 11 is formed around the inner end of the collar 10 and a flange ring 18 is fixed by any usual and well-known means to the other end of the collar, forming a peripheral groove within which is located a ring 19 bearing against the ball-bearing 80 located between said ring and the flange 'I'I.

Studs 8L, carried by a yoke M, are located within suitable openings 82 in the ring 19.

The yoke 8| is pivoted as at 88 upon the housing I2 and provided with the depending lever arm 84 having a conical roller 85 located within the cam groove 86 in the cam 81 fixed upon the cam shaft l9.

A conical roller 88 is carried by the toolholder bearing 2| and rides within a. cam groove 89 formed in the cam 81.

A pair of longitudinally disposed guide rods 90 may be connected at one end to the housing I3, the other ends of these rods being connected to a cross frame 9| which may be supported above the floor as by legs 82.

A cross head 98 is mounted for longitudinal adjustment upon the guide rods 90 being preferably provided with the split bearings 94 having bolts 95 for clamping the bearings around the mounted upon the guide rods to hold the cross head in adjusted position thereon.

The upright post 86 is formed upon the cross head 88 and carries. a micro-switch indicated generally at 81 and provided with a plunger 98.

This micro-switch controls the starting of th I3 and in the cross frame 9| and provided with a key I00.

A rocker arm IOI is fixed upon this.rocker shaft and has a roller I02 iournaled in its free end and arranged to ride upon the cam I03 fixed upon the cam shaft I9.

A cam I04 is fixed upon the cam shaft adjacent to the cam I03 and adapted to actuate the plunger I05 'of the micro-switch I06 which is bed I0 and adapted to control the stopping of the motor I6 by opening the circuit to said motor when the plunger I05 is depressed.

A rocker arm I01 is provided with abearing portion I08 slidab'ly mounted upon the rocker shaft 99 and keyed thereto by the key I00.

A cylinder I09 is carried by the upper end of the arm I01 and has mounted therein a plunger IIO having a longitudinally disposed stop screw III adjustably mounted therein and provided with the head H2 for engagement by the end of the tube II3 which is to be out.

A cap H4 is mounted upon the screw III and a coil spring H6 is interposed between said cap and the end of the cylinder,

The rear end of the plunger I I0 may be provided with a head II6 for contact with the plunger 98 of the micro-switch 91.

A bumper plate II! is carried by the arm I01 and a coil spring II8 may be connected to said bumper plate and to the cross head 93 to urge the parts into the position best shown in Fig. 2.

In the operation of the machine with the motor I5 operating and continuously rotating the tool holder 25, the tube II3 to be cut off is inserted from the left side of the machine, as viewed in Figs. 1 and '7 being passed through the clamping collets and the open center of the tool holder and into contact with the head II2 of the plunger I I0 moving said plunger to the right so that the head II6 thereof contacts the plunger 98 of the micro-switch 91 closing the circuit to the motor This starts the rotation of the cam shaft I9 and also operation'of the fluid cylinder 50 moving the plunger thereof toward the right and the cylinder toward the left and through the lever arms 41 and 62 and yokes 45 and 60, respectively, the collet clamping collars 48 and 56 are moved in opposite directions away from each other, the tapered ends thereof engaging the tapered ends of the collets and clamping them tightly upon the tube H3. I

With the tube thus held firmly against rotation and longitudinal movement, the cam groove 86 acting upon the roller will swing the lever arm 84 to the left, as viewed in Fig. 1, swinging the yoke 8| to the right and through the ring I9 the collar 'I'l willbe moved to the right.

The inclined posts 14 upon the tool carriers 68 will ride through the inclined bores I6 in the collar 11 moving the tool carriers radially inward,

the cutting off tool 65 severing the tube,

, At this point the cam groove 89 acting upon I the roller 88 will cause the tool holder bearing 2| to move to the left facing the left hand end of the cut by the facing tool 66 after which the bearing 2| moves to the right facing the right hand side of the cut by the tool 61 after which the bearing 2| is moved back to the normal position.

Each end of the cut is thus faced to accurate measurements.

At this time the high point of the cam I03 acting upon the roller I02 will swing the arm IM and through it the shaft 99 and arm I01 to the dotted line position shown in Fig. 2, and the high point of the cam I04 will engage the plunger I05 of the micro-switch I00 stopping the motor I6 and operating the fluid cylinder 50 and plunger 49 in'the opposite direction to release the clamping collets.

When the arm I01 is swung to the dotted line position, shown in Fig. 2, the bumper plate II! will be permitted to swing slightly upon its pivot H9, on the arm I01, so that the notch I20 in the rear side of the bumper plate may receive the stud I2I, holding the parts in this position temporarily.

As the tube is again pushed forwardly through the machine the cut off portion thereof will be forced out of the machine, and the end thereof striking the bumper plate H1 and swinging it upon its pivot H9, releasing the notch I20 from the stud I2I and permitting the spring H8 to pull the parts back to the full line position of Fig. 2 and the cut ofi section of thetube will drop from the machine while the remainder of the tube may be positioned for the next operation of the machine, and the operation will be repeated as above described.

We claim:

1. A machine of the character described including a rotating tool holder, three radially movable tool-carriers slidably mounted in said tool holder, a cutting-01f tool carried in one tool carrier, a pair of oppositely disposed facing tools carried in the other two tool carriers, means for supporting a tube, or the like to be cut off, axially of said tool holder, and means for producing relative longitudinal movement alternately in opposite directions between the tube and the tool holder.

' 2. A machine of the character described including a rotating tool holder, three radially movable tool carriers slidably mounted in said toolholder, a cutting-oil tool carried in one tool carrier, a pair of oppositely disposed facing tools carried in the other two tool carriers, means for supporting a'tube, or the like to be 'cut oil, axially of said tool holder, and means for moving the tool holder longitudinally alternately in opposite directions relative to the tube.

3. A machine of the character described including a rotating tool holder, three radially movable tool carriers slidably mounted in said tool holder, a cutting-oil tool carried in one tool carrier, a pair of oppositely disposed facing tools carried in the other two tool carriers, means for supporting a tube, or the like to be cut off, axially of said tool holder, means for moving the tool holder longitudinally alternately in opposite directions relative to the tube, and for then returning the tool holder to the initial position.

4. A machine of the character described including a rotating tool holder, a plurality of 1adially movable tool carriers slidably mounted in said tool holder, cutting and facing tools carried in said tool carriers, means for supporting a tube, or the like to be cut oil, axially of said tool holder, and means operated by the insertion of a tube into the machine for producing relative longitudinal movement alternately in opposite directions between the tube and the tool holder.

5. A machine of the character described including a rotating tool holder, three radially movable tool carriers slidably mounted in said tool holder, a cutting-oil tool carried in one tool carrier, a pair of oppositely disposed facing tools carried in the other two tool carriers, means for supporting avtube, or the like to be cut oil, axially of said tool holder, and means operated by the insertion of a tube into the machine for producing relative longitudinal movement alternately in opposite directions between the tube and the tool holder.

6. A machine of the character described including a rotating tool holder, three radially movable tool carriers slidably mounted in said tool holder, a cutting-ofitool carried in one tool carrier, a pair of oppositely disposed facing tools carried in the other two tool carriers, means for supporting a tube, or the like to be cut off, axially of said tool holder, means operated by the insertion of a tube into the machine for clamping the tube, and means for producing relative longitudinal movement alternately in opposite directions between the tube and the tool holder.

7. A machine of the character described including a rotating tool holder, a plurality of radially holder, and means operated by the insertion of the tube for moving the tool holder longitudinally, alternately in opposite directions relative to the tube.

8. A machine of the character described including a rotating tool holder, a plurality of radially movable tool carriers slidably mounted in said tool holder, cutting and facing tools carried in said tool carriers, fluid cylinder means operated by insertion of a tube axially through the machine for moving the tool carriers radially in the rotating tool holder, and means operated by the insertion of the tube for moving the tool holder longitudinally, alternately in opposite (ii-.- rections relative to the tube. V

9. A machine of the character described including a rotating tool holder, a plurality of radially movable tool carriers slidably mounted in said tool holder, cutting and facing tools carried in said tool carriers, means operated by insertion of a tube axially through the machine for moving the tool carriers radially in the rotating tool holder, and cam means operated by the insertion of the tube for moving the tool holder longitudi- RALPH E. SPIKER. 

